rockrees Posted February 22, 2014 Posted February 22, 2014 Seems since I've had the head gasket done that the car doesn't run as it should, I know it needs a remap due to having the TD04 billet turbo instead of the Garrett gt28rs, but it still shouldn't affect it when it's not under load? Some times on first starting the car up the revs drop and the car dies if not reved up for a few seconds.When pulling away smoothly (slowly) through the gears, the air/fuel ratio goes from 14/15 into 18 and beyond what it can read. running too lean. (Normal)? This one really has me stumped. Depending on how the car feels, on idle the air/fuel ratio will vary from 12 to 16, tried tinkering with the fuel pressure regulator, but if I put less fuel into the engine it holds back as I pull away and runs too lean, too much and on idle the opposite happens. (Yet I still have the same two problems stated above no matter what I try to do). Any ideas what the problem is? I'm taking the 5 hour drive up to Tuning Developments to get it mapped as soon as the clutch had been bedded in, but would be nice to know if it's fixable here. Quote
GP82 Posted February 23, 2014 Posted February 23, 2014 Check, clean idle control valve, check the resistant values of coolant temp sensor, but i think it is poss you may need to check throttle pos sensor as you are experiencing this problem at part throttle. As you have recently changed the headgasket whip the cambelt covers off and confirm the valve timing is to factory setting in relation to crank pos. Quote
turbo Grant Posted February 23, 2014 Posted February 23, 2014 The O2 sensors in the exhaust can frek up when the HG goes. The O2 sensors don't like coming in contact with anti freeze Quote
rockrees Posted February 23, 2014 Author Posted February 23, 2014 (edited) Had a brand new custom made £800 exhaust system fitted as well so you might be right there. Had the garage check the idle position because it idles too high and gets stuck, won't go any lower than it is though. Had a cambelt change as well, will double check timing just to be sure. After the headgasket change it ran like crap, was over fueling, and on boost running too lean, felt like a time bomb, most useless garage I've been to, wish I had done the job myself. if only I had the time.Took it to a performance specialist garage and they got it running as best as they could. (was wires not connected and who knows what else they forgot to connect) but now I want it running perfectly. Thanks Edited February 23, 2014 by rockrees Quote
templar2007 Posted February 23, 2014 Posted February 23, 2014 The O2 sensors in the exhaust can frek up when the HG goes. The O2 sensors don't like coming in contact with anti freezethat happened to mite when my head gasket went Quote
rockrees Posted February 23, 2014 Author Posted February 23, 2014 Also does anyone know what the black button on the drivers side foot well is for? Quote
rockrees Posted February 25, 2014 Author Posted February 25, 2014 There's a tiny black button in the drivers side foot well, on the right hand side, no idea what it does. I'll get a picture up tomorrow of it, been bugging me for ages. Quote
rockrees Posted March 16, 2014 Author Posted March 16, 2014 The switch didn't do anything, aah well. On the other hand I finally got around to fitting the lambda sensor, it improved everything a lot but it still goes to stall on start up, sometimes it starts up perfectly, sometimes it needs revving to sort it out, any more other ideas? Quote
rockrees Posted March 17, 2014 Author Posted March 17, 2014 By improved everything I mean my air/fuel ratio isn't jumping all around the house.Also polished up my engine bay which has helped strangely.. Quote
5T4R7ET N/A Posted March 17, 2014 Posted March 17, 2014 What afr is it showing 5 seconds after cold start up? Should be around 11.5-12,then lean off as it warms up. Quote
rockrees Posted March 17, 2014 Author Posted March 17, 2014 Arf shows off the chart so over 18, meaning it's running lean? Then it's stalls if not revved. Quote
rockrees Posted March 17, 2014 Author Posted March 17, 2014 Once it's sorted it's self out, it stays around 14/15 Quote
rockrees Posted March 17, 2014 Author Posted March 17, 2014 Also sounds like it's misfiring, only when it's running like crap from start up. Quote
triple j Posted March 18, 2014 Posted March 18, 2014 Put the stock fpr back on, if u still have the same problems u have something dodge with the map. Quote
rockrees Posted March 18, 2014 Author Posted March 18, 2014 (edited) Don't have the stock one buddy, was running right with this one on it before the headgasket went, so see no reason for it to be the fpr.Needs a map anyway because of the different turbo, but that shouldn't effect startup surely. I'll be making the 5 hour journey to tuning developments soon for that once the clutch has fully bedded in.Edit... Took it to Tuning Developments, (really great guys by the way, really honest and helped a lot!) just needed a remap and the problem sorted itself out. Thanks for the help everyone. Edited April 6, 2014 by rockrees Quote
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